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<tr class="t-nv-h2"><td colspan="5"> 文件 I/O </td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_ifstream.html" title="cpp/io/basic ifstream"><span class="t-lines"><span>basic_ifstream</span></span></a></div></div></td></tr>
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<tr class="t-nv-h2"><td colspan="5"> 字符串 I/O </td></tr>
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<tr class="t-nv-h2"><td colspan="5"> 数组 I/O </td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="istrstream.html" title="cpp/io/istrstream"><span class="t-lines"><span>istrstream</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-deprecated-cxx98">(C++98 中弃用)</span></span></span></div></div></td></tr>
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<tr class="t-nv-h2"><td colspan="5"> 同步的输出</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="basic_osyncstream.html" title="cpp/io/basic osyncstream"><span class="t-lines"><span>basic_osyncstream</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> 类型 </td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="streamoff.html" title="cpp/io/streamoff"><span class="t-lines"><span>streamoff</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="streamsize.html" title="cpp/io/streamsize"><span class="t-lines"><span>streamsize</span></span></a></div></div></td></tr>
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<tr class="t-nv-h1"><td colspan="5"> 错误类别接口 </td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="iostream_category.html" title="cpp/io/iostream category"><span class="t-lines"><span>iostream_category</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
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<tr class="t-nv-h2"><td colspan="5">浮点格式化</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
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<tr class="t-nv-h2"><td colspan="5">整数格式化</td></tr>
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<tr class="t-nv-h2"><td colspan="5">布尔格式化</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/boolalpha.html" title="cpp/io/manip/boolalpha"><span class="t-lines"><span>boolalpha</span><span>noboolalpha</span></span></a></div></div></td></tr>
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<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/setw.html" title="cpp/io/manip/setw"><span class="t-lines"><span>setw</span></span></a></div></div></td></tr>
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<tr class="t-nv-h2"><td colspan="5">空白符处理</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/ws.html" title="cpp/io/manip/ws"><span class="t-lines"><span>ws</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/ends.html" title="cpp/io/manip/ends"><span class="t-lines"><span>ends</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/skipws.html" title="cpp/io/manip/skipws"><span class="t-lines"><span>skipws</span><span>noskipws</span></span></a></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5">输出冲入</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/flush.html" title="cpp/io/manip/flush"><span class="t-lines"><span>flush</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/endl.html" title="cpp/io/manip/endl"><span class="t-lines"><span>endl</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/flush_emit.html" title="cpp/io/manip/flush emit"><span class="t-lines"><span>flush_emit</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"> <br>
</td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/unitbuf.html" title="cpp/io/manip/unitbuf"><span class="t-lines"><span>unitbuf</span><span>nounitbuf</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/emit_on_flush.html" title="cpp/io/manip/emit on flush"><span class="t-lines"><span>emit_on_flush</span><span>no_emit_on_flush</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5">状态标志操纵</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/resetiosflags.html" title="cpp/io/manip/resetiosflags"><span class="t-lines"><span>resetiosflags</span></span></a></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/setiosflags.html" title="cpp/io/manip/setiosflags"><span class="t-lines"><span>setiosflags</span></span></a></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5">时间与金钱 I/O</td></tr>
<tr class="t-nv-col-table"><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/get_money.html" title="cpp/io/manip/get money"><span class="t-lines"><span>get_money</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/get_time.html" title="cpp/io/manip/get time"><span class="t-lines"><span>get_time</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
</table></div></td><td><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/put_money.html" title="cpp/io/manip/put money"><span class="t-lines"><span>put_money</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/put_time.html" title="cpp/io/manip/put time"><span class="t-lines"><span>put_time</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div></td></tr>
</table></div></td></tr>
<tr class="t-nv-h2"><td colspan="5">带引号操纵符</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="manip/quoted.html" title="cpp/io/manip/quoted"><span class="t-lines"><span>quoted</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div></div></td></tr>
</table></div><div></div></div></div></div><div class="t-navbar-sep"> </div></div>
<p>操纵符是令代码能以 <span class="t-c"><span class="mw-geshi cpp source-cpp">operator<span class="sy1">&lt;&lt;</span></span></span> 或 <span class="t-c"><span class="mw-geshi cpp source-cpp">operator<span class="sy1">&gt;&gt;</span></span></span> 控制输入/输出流的帮助函数。
</p><p>不以参数调用的操纵符（例如 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <a href="manip/boolalpha.html"><span class="kw1764">std::<span class="me2">boolalpha</span></span></a><span class="sy4">;</span></span></span> 或 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cin.html"><span class="kw1756">std::<span class="me2">cin</span></span></a> <span class="sy1">&gt;&gt;</span> <a href="manip/hex.html"><span class="kw1782">std::<span class="me2">hex</span></span></a><span class="sy4">;</span></span></span> ）实现为接受到流的引用为其唯一参数的函数。 <a href="basic_ostream/operator_ltlt.html" title="cpp/io/basic ostream/operator ltlt"><tt>basic_ostream::operator&lt;&lt;</tt></a> 和 <a href="basic_istream/operator_gtgt.html" title="cpp/io/basic istream/operator gtgt"><tt>basic_istream::operator&gt;&gt;</tt></a> 的特别重载版本接受指向这些函数的指针。<span class="t-rev-inl t-since-cxx20"><span>这些函数（或函数模板的实例化）是标准库中仅有的<a href="../language/extending_std.html#.E5.8F.AF.E5.8F.96.E5.9D.80.E5.87.BD.E6.95.B0" title="cpp/language/extending std">可取址函数</a>。</span> <span><span class="t-mark-rev t-since-cxx20">(C++20 起)</span></span></span>
</p><p>以参数调用的操纵符（例如 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <a href="manip/setw.html"><span class="kw1797">std::<span class="me2">setw</span></span></a><span class="br0">(</span><span class="nu0">10</span><span class="br0">)</span><span class="sy4">;</span></span></span> ）实现为返回未指定类型对象的函数。这些操纵符定义其自身的进行请求操作的 <code>operator&lt;&lt;</code> 或 <code>operator&gt;&gt;</code> 。
</p>
<table class="t-dsc-begin">

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;ios&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/boolalpha.html" title="cpp/io/manip/boolalpha"> <span class="t-lines"><span>boolalpha</span><span>noboolalpha</span></span></a></div></div>
</td>
<td>  在布尔值的文本和数值表示间切换 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/showbase.html" title="cpp/io/manip/showbase"> <span class="t-lines"><span>showbase</span><span>noshowbase</span></span></a></div></div>
</td>
<td>  控制是否使用前缀指示数值基数 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/showpoint.html" title="cpp/io/manip/showpoint"> <span class="t-lines"><span>showpoint</span><span>noshowpoint</span></span></a></div></div>
</td>
<td>  控制浮点表示是否始终包含小数点 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/showpos.html" title="cpp/io/manip/showpos"> <span class="t-lines"><span>showpos</span><span>noshowpos</span></span></a></div></div>
</td>
<td>  控制是否将 <code>+</code> 号与非负数一同使用 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/skipws.html" title="cpp/io/manip/skipws"> <span class="t-lines"><span>skipws</span><span>noskipws</span></span></a></div></div>
</td>
<td>  控制是否跳过输入上的前导空白符 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/uppercase.html" title="cpp/io/manip/uppercase"> <span class="t-lines"><span>uppercase</span><span>nouppercase</span></span></a></div></div>
</td>
<td>   控制一些输出操作是否使用大写字母  <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/unitbuf.html" title="cpp/io/manip/unitbuf"> <span class="t-lines"><span>unitbuf</span><span>nounitbuf</span></span></a></div></div>
</td>
<td>  控制是否每次操作后冲洗输出 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/left.html" title="cpp/io/manip/left"> <span class="t-lines"><span>internal</span><span>left</span><span>right</span></span></a></div></div>
</td>
<td>  设置填充字符的布置 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/hex.html" title="cpp/io/manip/hex"> <span class="t-lines"><span>dec</span><span>hex</span><span>oct</span></span></a></div></div>
</td>
<td>  更改用于整数 I/O 的基数 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/fixed.html" title="cpp/io/manip/fixed"> <span class="t-lines"><span>fixed</span><span>scientific</span><span>hexfloat</span><span>defaultfloat</span></span></a></div><div><span class="t-lines"><span></span><span></span><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  更改用于浮点 I/O 的格式化 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc-sep">
<td colspan="2">  
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;istream&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/ws.html" title="cpp/io/manip/ws"> <span class="t-lines"><span>ws</span></span></a></div></div>
</td>
<td>  消耗空白符 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc-sep">
<td colspan="2">  
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;ostream&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/ends.html" title="cpp/io/manip/ends"> <span class="t-lines"><span>ends</span></span></a></div></div>
</td>
<td>  输出 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="st0">'<span class="es5">\0</span>'</span></span></span> <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/flush.html" title="cpp/io/manip/flush"> <span class="t-lines"><span>flush</span></span></a></div></div>
</td>
<td>  冲洗输出流 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/endl.html" title="cpp/io/manip/endl"> <span class="t-lines"><span>endl</span></span></a></div></div>
</td>
<td>  输出 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="st0">'<span class="es1">\n</span>'</span></span></span> 并冲洗输出流 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/emit_on_flush.html" title="cpp/io/manip/emit on flush"> <span class="t-lines"><span>emit_on_flush</span><span>no_emit_on_flush</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  控制流的 <a href="basic_syncbuf.html" title="cpp/io/basic syncbuf"><tt>basic_syncbuf</tt></a> 是否在冲入时发射 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/flush_emit.html" title="cpp/io/manip/flush emit"> <span class="t-lines"><span>flush_emit</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div></div>
</td>
<td>  冲入流，而若它使用 <a href="basic_syncbuf.html" title="cpp/io/basic syncbuf"><tt>basic_syncbuf</tt></a> 则发射其内容 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc-sep">
<td colspan="2">  
</td></tr>
<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;iomanip&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/resetiosflags.html" title="cpp/io/manip/resetiosflags"> <span class="t-lines"><span>resetiosflags</span></span></a></div></div>
</td>
<td>  清除指定的 ios_base 标志 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/setiosflags.html" title="cpp/io/manip/setiosflags"> <span class="t-lines"><span>setiosflags</span></span></a></div></div>
</td>
<td>  设置指定的 ios_base 标志 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/setbase.html" title="cpp/io/manip/setbase"> <span class="t-lines"><span>setbase</span></span></a></div></div>
</td>
<td>  更改用于整数 I/O 的基数 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/setfill.html" title="cpp/io/manip/setfill"> <span class="t-lines"><span>setfill</span></span></a></div></div>
</td>
<td>  更改填充字符 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/setprecision.html" title="cpp/io/manip/setprecision"> <span class="t-lines"><span>setprecision</span></span></a></div></div>
</td>
<td>  更改浮点精度 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/setw.html" title="cpp/io/manip/setw"> <span class="t-lines"><span>setw</span></span></a></div></div>
</td>
<td>  更改下个输入/输出域的宽度 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/get_money.html" title="cpp/io/manip/get money"> <span class="t-lines"><span>get_money</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  剖析货币值 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/put_money.html" title="cpp/io/manip/put money"> <span class="t-lines"><span>put_money</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  格式化并输出货币值 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/get_time.html" title="cpp/io/manip/get time"> <span class="t-lines"><span>get_time</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  剖析指定格式的日期/时间值 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/put_time.html" title="cpp/io/manip/put time"> <span class="t-lines"><span>put_time</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div></div>
</td>
<td>  按照指定格式格式化并输出日期/时间值 <br> <span class="t-mark">(函数模板)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="manip/quoted.html" title="cpp/io/manip/quoted"> <span class="t-lines"><span>quoted</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div></div>
</td>
<td>   插入和读取带有内嵌空格的被引号括起来的字符串  <br> <span class="t-mark">(函数模板)</span> </td></tr>
</table>

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